HTML Smuggling
Subtechnique · ATTACK:enterprise:T1027.006
Attributed source ↗ · Plaintext record · Complete record and assertions JSON
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{
"id": "ATTACK:enterprise:T1027.006",
"title": "HTML Smuggling",
"type": "Subtechnique",
"source_url": "https://attack.mitre.org/techniques/T1027/006",
"snapshot": "enterprise-attack-20.0.json",
"status": "active",
"rights": "Source metadata only; source notices retained; no operational prose or payloads",
"review_status": "machine-extracted; source-specific checks passed, editorial review pending",
"stix_id": "attack-pattern--d4dc46e3-5ba5-45b9-8204-010867cacfcb",
"external_id": "T1027.006",
"domain": "enterprise",
"created": "2021-05-20T12:20:42.219Z",
"modified": "2026-05-12T15:12:00.717Z",
"version": "2.0",
"aliases": [
],
"tactics": [
"stealth"
],
"source_references": [
{
"source_name": "Outlflank HTML Smuggling 2018",
"url": "https://outflank.nl/blog/2018/08/14/html-smuggling-explained/"
},
{
"source_name": "MSTIC NOBELIUM May 2021",
"url": "https://www.microsoft.com/security/blog/2021/05/27/new-sophisticated-email-based-attack-from-nobelium/"
},
{
"source_name": "HTML Smuggling Menlo Security 2020",
"url": "https://www.menlosecurity.com/blog/new-attack-alert-duri"
},
{
"source_name": "nccgroup Smuggling HTA 2017",
"url": "https://www.nccgroup.com/us/research-blog/smuggling-hta-files-in-internet-exploreredge/"
}
]
}Explicit source assertions (5)
First 80 shown here; the complete set is in this record’s JSON and plaintext. Each relationship retains its source and locator. No inferred relationships are added.
ATTACK:enterprise:M1048 → mitigates → ATTACK:enterprise:T1027.006
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--15e815c2-ab92-4490-b0ba-f94dddfe8b01
ATTACK:enterprise:T1027.006 → subtechnique-of → ATTACK:enterprise:T1027
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--4347eb2b-b33d-4e17-94f2-3701e18f0cab
ATTACK:enterprise:S0650 → uses → ATTACK:enterprise:T1027.006
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--4a759577-622f-4ef0-bff1-ef047aa5a687
Trend Micro Black Basta October 2022 · Deep Instinct Black Basta August 2022ATTACK:enterprise:G0016 → uses → ATTACK:enterprise:T1027.006
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--5bc4476e-9693-424c-b4d1-fd3a9ca996f3
ESET T3 Threat Report 2021ATTACK:enterprise:S0634 → uses → ATTACK:enterprise:T1027.006
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--a6006789-f164-4616-9a1f-20fd2b34113f
MSTIC Nobelium Toolset May 2021